Ok so I bought a 3 inch jd 3 days ago and he's not eating. All he's doing is hiding in his little ornament that I bought for him and some times he swims when I'm peeking throught the door and hides when I go in to take a look. I tried tropical flakes, pellets, dried shrimp etc. Can someone please help me. I don't want him to die. Tank size is 55 gallons